Imagine that the parameters r, l, c, and the amplitude of the voltage v0 are fixed, but the frequency of the voltage source is changeable. if the frequency of the source is changed from a very low one to a very high one, the current amplitude i0 will also change. the frequency at which i0 is at a maximum is called resonance. find the frequency ï0 at which the circuit reaches resonance.

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?